Add session setting support for specs

This adds support for session settings for the various specs formats.
These session settings will be applied by the http/pg client before
the spec is executed.

cr8/bench_spec.py

@@ -30,12 +30,13 @@ def from_dict(d):
 
 
 class Spec:
-    def __init__(self, setup, teardown, queries=None, load_data=None, meta=None):
+    def __init__(self, setup, teardown, queries=None, load_data=None, meta=None, session_settings=None):
         self.setup = setup
         self.teardown = teardown
         self.queries = queries
         self.load_data = load_data
         self.meta = meta or {}
+        self.session_settings = session_settings or {}
 
     @staticmethod
     def from_dict(d):
@@ -45,6 +46,7 @@ def from_dict(d):
             meta=d.get('meta', {}),
             queries=d.get('queries', []),
             load_data=d.get('load_data', []),
+            session_settings=d.get('session_settings', {}),
         )
 
     @staticmethod

cr8/clients.py

@@ -216,18 +216,25 @@ def _verify_ssl_from_first(hosts):
 
 
 class AsyncpgClient:
-    def __init__(self, hosts, pool_size=25):
+    def __init__(self, hosts, pool_size=25, session_settings=None):
         self.dsn = _to_dsn(hosts)
         self.pool_size = pool_size
         self._pool = None
         self.is_cratedb = True
+        self.session_settings = session_settings or {}
 
     async def _get_pool(self):
+
+        async def set_session_settings(conn):
+            for setting, value in self.session_settings.items():
+                await conn.execute(f'set {setting}={value}')
+
         if not self._pool:
             self._pool = await asyncpg.create_pool(
                 self.dsn,
                 min_size=self.pool_size,
-                max_size=self.pool_size
+                max_size=self.pool_size,
+                setup=set_session_settings
             )
         return self._pool
 
@@ -308,7 +315,7 @@ def _append_sql(host):
 
 
 class HttpClient:
-    def __init__(self, hosts, conn_pool_limit=25):
+    def __init__(self, hosts, conn_pool_limit=25, session_settings=None):
         self.hosts = hosts
         self.urls = itertools.cycle(list(map(_append_sql, hosts)))
         self._connector_params = {
@@ -317,13 +324,21 @@ def __init__(self, hosts, conn_pool_limit=25):
         }
         self.__session = None
         self.is_cratedb = True
+        self.session_settings = session_settings or {}
 
     @property
     async def _session(self):
         session = self.__session
         if session is None:
             conn = aiohttp.TCPConnector(**self._connector_params)
             self.__session = session = aiohttp.ClientSession(connector=conn)
+            for setting, value in self.session_settings.items():
+                payload = {'stmt': f'set {setting}={value}'}
+                await _exec(
+                    session,
+                    next(self.urls),
+                    dumps(payload, cls=CrateJsonEncoder)
+                )
         return session
 
     async def execute(self, stmt, args=None):
@@ -372,10 +387,10 @@ def __exit__(self, exc_type, exc_val, exc_tb):
         self.close()
 
 
-def client(hosts, concurrency=25):
+def client(hosts, session_settings=None, concurrency=25):
     hosts = hosts or 'localhost:4200'
     if hosts.startswith('asyncpg://'):
         if not asyncpg:
             raise ValueError('Cannot use "asyncpg" scheme if asyncpg is not available')
-        return AsyncpgClient(hosts, pool_size=concurrency)
-    return HttpClient(_to_http_hosts(hosts), conn_pool_limit=concurrency)
+        return AsyncpgClient(hosts, pool_size=concurrency, session_settings=session_settings)
+    return HttpClient(_to_http_hosts(hosts), conn_pool_limit=concurrency, session_settings=session_settings)

cr8/engine.py

@@ -69,9 +69,9 @@ def _generate_statements(stmt, args, iterations, duration):
 
 
 class Runner:
-    def __init__(self, hosts, concurrency, sample_mode):
+    def __init__(self, hosts, concurrency, sample_mode, session_settings=None):
         self.concurrency = concurrency
-        self.client = client(hosts, concurrency=concurrency)
+        self.client = client(hosts, session_settings=session_settings, concurrency=concurrency)
         self.sampler = get_sampler(sample_mode)
 
     def warmup(self, stmt, num_warmup, concurrency=0, args=None):

cr8/run_spec.py

@@ -81,12 +81,14 @@ def __init__(self,
                  result_hosts,
                  log,
                  fail_if,
-                 sample_mode):
+                 sample_mode,
+                 session_settings):
         self.benchmark_hosts = benchmark_hosts
         self.sample_mode = sample_mode
+        self.session_settings = session_settings
         self.spec_dir = spec_dir
-        self.client = clients.client(benchmark_hosts)
-        self.result_client = clients.client(result_hosts)
+        self.client = clients.client(benchmark_hosts, session_settings)
+        self.result_client = clients.client(result_hosts, session_settings)
         self.server_version_info = aio.run(self.client.get_server_version)
         self.server_version = parse_version(self.server_version_info['number'])
         self.log = log
@@ -204,7 +206,7 @@ def run_queries(self, queries: Iterable[dict], meta=None):
                  f'   Concurrency: {concurrency}\n'
                  f'   {mode_desc}: {duration or iterations}')
             )
-            with Runner(self.benchmark_hosts, concurrency, self.sample_mode) as runner:
+            with Runner(self.benchmark_hosts, concurrency, self.sample_mode, self.session_settings) as runner:
                 if warmup > 0:
                     runner.warmup(stmt, warmup, concurrency, args)
                 timed_stats = runner.run(
@@ -242,15 +244,17 @@ def do_run_spec(spec,
                 action=None,
                 fail_if=None,
                 re_name=None):
+    spec_dir = os.path.dirname(spec)
+    spec = load_spec(spec)
     with Executor(
-        spec_dir=os.path.dirname(spec),
+        spec_dir=spec_dir,
         benchmark_hosts=benchmark_hosts,
         result_hosts=result_hosts,
         log=log,
         fail_if=fail_if,
-        sample_mode=sample_mode
+        sample_mode=sample_mode,
+        session_settings=spec.session_settings
     ) as executor:
-        spec = load_spec(spec)
         try:
             if not action or 'setup' in action:
                 log.info('# Running setUp')

specs/count_countries.json

@@ -14,6 +14,10 @@
             }
         ]
     },
+    "session_settings": {
+            "application_name": "my_app",
+            "timezone": "UTC"
+    },
     "queries": [{
         "iterations": 1000,
         "statement": "select count(*) from countries"

specs/sample.py

@@ -1,4 +1,3 @@
-
 from itertools import count
 from cr8.bench_spec import Spec, Instructions
 
@@ -21,4 +20,5 @@ def queries():
     setup=Instructions(statements=["create table t (x int)"]),
     teardown=Instructions(statements=["drop table t"]),
     queries=queries(),
-)
+    session_settings={'application_name': 'my_app', 'timezone': 'UTC'}
+)

specs/sample.toml

@@ -14,6 +14,10 @@ statement_files = ["sql/create_countries.sql"]
     target = "countries"
     cmd = ['echo', '{"capital": "Demo"}']
 
+[session_settings]
+application_name = 'my_app'
+timezone = 'UTC'
+
 [[queries]]
 name = "count countries" # Can be used to give the queries a name for easier analytics of the results
 statement = "select count(*) from countries"

tests/test_integration.py

@@ -63,7 +63,7 @@ def parse(self, string, name='<string>'):
 class SourceBuildTest(TestCase):
 
     def test_build_from_branch(self):
-        self.assertIsNotNone(get_crate('4.1'))
+        self.assertIsNotNone(get_crate('5.8'))
 
 
 def load_tests(loader, tests, ignore):

tests/test_spec.py

@@ -0,0 +1,30 @@
+import os
+from unittest import TestCase
+from doctest import DocTestSuite
+
+from cr8.bench_spec import load_spec
+
+from cr8 import engine
+
+
+class SpecTest(TestCase):
+
+    def test_session_settings_from_spec(self):
+        spec = self.get_spec('sample.py')
+        self.assertEqual(spec.session_settings, {'application_name': 'my_app', 'timezone': 'UTC'})
+
+    def test_session_settings_from_toml(self):
+        spec = self.get_spec('sample.toml')
+        self.assertEqual(spec.session_settings, {'application_name': 'my_app', 'timezone': 'UTC'})
+
+    def test_session_settings_from_json(self):
+        spec = self.get_spec('count_countries.json')
+        self.assertEqual(spec.session_settings, {'application_name': 'my_app', 'timezone': 'UTC'})
+
+    def get_spec(self, name):
+        return load_spec(os.path.abspath(os.path.join(os.path.dirname(__file__), '../specs/', name)))
+
+
+def load_tests(loader, tests, ignore):
+    tests.addTests(DocTestSuite(engine))
+    return tests